David Joseph Gaffin - 14 May 2021 Form 4 Insider Report for Alkermes plc. (ALKS)

Role: SVP, CLO, Alkermes, Inc.
Signature: /s/ Shantale Greenson, attorney-in-fact for David J. Gaffin
Issuer symbol: ALKS
Transactions as of: 14 May 2021
Net transactions value: -$9,281
Form type: 4
Filing time: 14 May 2021, 16:47:28 UTC
Next filing: 08 Jun 2021
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ALKS	Ordinary Shares	Options Exercise	$40,736	+2,250	+3%	$18.10	76,847	14 May 2021	Direct	F1
transaction	ALKS	Ordinary Shares	Sale	$50,018	-2,250	-2.9%	$22.23	74,597	14 May 2021	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ALKS	Employee Stock Option (Right to Buy)	Options Exercise	$0	-2,250	-100%	$0.000000^*	0	14 May 2021	Ordinary Shares	2,250	$18.10	Direct	F1, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This option exercise was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
F2	This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
F3	These options are fully vested in accordance with their terms.